peejay

If you already have the Holley manifold, find a disused 3310 carb (750 vac-sec) and you can make your own 4x42mm ITBs.

This is my setup. It kicks ***.

costas

iTrader: (1)

Hey peejay do you still use the Vac secondaries or run primary secondaries together ?
and do you primary and secondary runner communicate ?

peejay

I am on EFI so take it as you will. All four throttle blades open at the same time. You do not want to have primary/secondary throttle on a bridge port or it will run like crap. Manifold is an unported Racing Beat unit that I added a pair of drillings, a channel, and a pressed-in tube so I could run filtered air to the injector bleeds. It works like ITBs, it just doesn't look like it

I don't know what grade aluminum the manifold is cast from, but it was a BEAR to cut the channel into! It was more like cutting steel than aluminum.